package xc.src.gaoji;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
    public static void main(String[] args) {
        TestLock2 testLock2 =new TestLock2();
        new Thread(testLock2).start();
        new Thread(testLock2).start();
        new Thread(testLock2).start();

    }
}

class TestLock2 implements  Runnable{
    int ticketNums = 10;
    //定义lock锁
    private  final  ReentrantLock lock =new ReentrantLock();

    @Override
    public void run() {
        while(true){
            lock.lock();//加锁
            try {
                lock.lock();//加锁
                if (ticketNums>0){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(ticketNums--);
                }else {
                    break;
                }
            }finally {
                //解锁
            lock.unlock();
            }
            if (ticketNums>0){
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
                System.out.println(ticketNums--);
            }else {
                break;
            }
        }
    }
}

